Vulnerability Description
A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Lxd | >= 4.0.0, < 4.0.12 |
Related Weaknesses (CWE)
References
- https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4mThird Party AdvisoryExploitMitigation
- https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4mThird Party AdvisoryExploitMitigation
FAQ
What is CVE-2026-63294?
CVE-2026-63294 is a vulnerability with a CVSS score of 9.9 (CRITICAL). A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly...
How severe is CVE-2026-63294?
CVE-2026-63294 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-63294?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Lxd.